diff --git a/include/Makefile.am b/include/Makefile.am
index 7c14785e4..3d0185ae0 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -23,8 +23,10 @@ sdk_HEADERS =		\
 	globals.h	\
 	input.h		\
 	inputstr.h	\
+	misc.h		\
 	miscstruct.h	\
 	opaque.h	\
+	os.h		\
 	pixmap.h	\
 	pixmapstr.h	\
 	property.h	\